There are two older technologies available.
- The first set up uses air from outside, heats it up with propane fired heaters then blows the superheated air it into the building through 12" flexible ducts. This is a very inefficient system because all of the air that is comes from outside has to be heated. As air is pushed into the building an equal amount has to leave the building. Obviously there is a huge amount of heat loss when this happens. The Heat Assault System recycles the air inside the target zone so much less energy is required. This older technology also requires significant technical training and knowledge to ensure an effective eradication and that safety is maintained. Because there is so much set up time required and technical knowledge and training of operators it is a much more expensive system to operate.
- The second machine uses a 40 kilowatt generator on a trailer. It runs heavy, high voltage electric cables into a building which are then connected to three electric heaters. While the system is relatively efficient in that it recycles the air in the target area it produces less than half of the heat energy into the eradication zone than the HA500X. Many people also have a fear of high voltage cables. Furthermore it is important to note that the cost of this machine is about the same as the Heat Assault 500X for less than half the heat output!